Lightweight construction in modern car design leads to an increased usage of various aluminium semi-finished products. Besides sheet material, aluminium extrusion profiles are frequently used due to their high stiffness and variety of possible cross-sections. However, similar to sheet material, aluminium profiles exhibit limited formability in comparison to mild steel materials. One possibility to increase the forming limits of precipitation hardened aluminium alloys is the so-called Tailored Heat Treatment technology. By a local short-term heat treatment, the material is softened and the material flow can be controlled to reduce stresses in critical forming zones. The purposeful definition of the heat treatment zones is mandatory to improve the forming results. Therefore, numerical methods are necessary. In this investigation, a numerical process chain is presented. It combines the thermo-mechanical simulation of a local laser heat treatment with a subsequent bending process of the heat-treated profile using the alloy EN AW-6082. The temperature distribution, mechanical properties, and finally, the bending result of the numerical model are validated by experimental tests.

中文翻译：

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铝定制热处理型材工艺链的数值建模

现代汽车设计中的轻量化结构导致各种铝制半成品的使用增加。除了板材外，铝挤压型材因其高刚度和多种可能的横截面而被频繁使用。然而，与板材类似，与低碳钢材料相比，铝型材的可成型性有限。提高沉淀硬化铝合金成形极限的一种可能性是所谓的定制热处理技术。通过局部短期热处理，材料被软化并且可以控制材料流动以减少关键成形区的应力。有目的地定义热处理区域对于改善成形结果是强制性的。因此，数值方法是必要的。在这次调查中，提出了一个数字过程链。它将局部激光热处理的热机械模拟与使用合金 EN AW-6082 的热处理型材的后续弯曲过程相结合。数值模型的温度分布、机械性能以及最后的弯曲结果都通过实验测试进行了验证。